I don't have access to the code anymore, unfortunately. But it kept track of a list of people waiting on the lock and then notified the first caller off the lis

I don't have access to the code anymore, unfortunately. But it kept track of a list of people waiting on the lock and then notified the first caller off the list when the lock was released. It was only beautifully simple with respect to what it would have been in a non single-threaded evnironment. I needed it in order to use a library that had some annoying global state in it.